Tack-pulling machine.



J. B. HADAWAY. TACK PULLING MAGHINB. APPLICATION FILED MAR. 1, 1911.

Patented July 2, 1912.

2 SHEETSSHEET 1.

lglnes s'es- COLUMBIA PLANMRAPH co.. WASHINGTON, D. c.

J. B. HADAWAY.

TAGK PULLING MACHINE.

' APPLIOATION IILBD MAR. 1. 1911.

1 ,030,886. Patented July 2, 1912.

2 SHEETSSHBET 2.

wines-Sesa- COLUMBIA PLANonRAPM co, WASHINGTON, D- r:v

TE STATES PATENT OFFICE.

JOHN B. HADAWAY, OF SWAMPSCOTT, MASSACHUSETTS, ASSIGNOR 'IO UNITED SHOEMACHINERY COMPANY, OF PA'IERSON,

JERSEY.

Application filed March 1,

To all whom it may concern:

Be it known that I, JOHN B. HADAWAY, a citizen of the United States,residing at Swampscott, in the county of Essex and State ofMassachusetts, have invented certain new and useful Improvements inTack- Iulling Machines; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

The present invention relates to tack pulling machines, and moreparticularly to' a tack pulling machine which is employed for partiallypulling the lasting tacks, or other temporary fastenings, which areinserted during the manufacture of shoes.

The principal object of the present invention is to provide an improvedmachine for partially pulling or lifting tacks or other fastenings acertain predetermined amount.

A further object of the invention is to enable the amount which the tackis lifted to be varied with accuracy and precision.

With these ends in view, a feature of the invention contemplates theprovision of a pair of tack gripping jaws which are automaticallyactuated to grasp the tack and hold it firmly in a fixed position, andin connection with these jaws, a mechanism which operatively engageswith the shoe and moves the shoe relat-ivelyto the tack.

A further feature of the invention consists in providing for anadjustment of the mechanism in order to vary the extent of the relativemovement of the shoe and tack gripping jaws, and consequently the amountwhich the tack is lifted.

In the accompanying drawings illustrating the preferred form of theinvention, Figure 1 represents a side elevation of the machine lookingat the same from the right-hand side, and showing the plunger in itsretracted position; Fig. 2 elevation of the machine; Fig. 3 is a viewsimilar to Fig. 1 and showing the plungerin its advanced position; andFig. 4: is a side elevation of the machine looking at the same from theleft-hand side and showing the plunger retracted and the jaws opened.

In the illustrated embodiment of the invention, the machine comprises apair of tack gripping jaws which are arranged to engage with the head ofa lasting tack and hold it in a fixed position, and means arSpecification of Letters Patent.

is a front end NEW JERSEY, A CORPORATION OF NEW TACK-PULLING MACHINE.

Patented July 2, 1912.

1911. Serial No. 611,740.

ranged to operatively engage with the shoe and force the shoe away fromthe tack gripplng jaws while the tack is held in a fixed position. Oneonly of the tack gripping jaws is movable and this jaw is operated bythe same cam which serves to move the shoe. The otherjaw is stationaryand cooperates with the movable tack gripping jaw to engage and hold atack. The tack gripping jaws are indicated at 1 and 2 and are arrangedwith their work engaging faces inclined in order that the tacks may beconveniently presented between them. The jaw 1 is detachably supportedupon a projecting bracket 1 mounted upon the main frame 5 of the machineand is retained in position by a set screw 6. In order to avoid anyturning or twisting of the jaw relatively to the bracket, the jaw isprovided with a dovetailed face engaging with a corresponding faceformed upon the bracket. The jaw 2 is mounted upon the lower end of acurved arm 7 which is pivoted centrally at 8 to the frame of themachine, and which is oscillated automatically to move the jaw 2 towardand from the jaw 1 at the proper intervals. The jaw 2 is provided with adovetailed. face engaging with a corresponding face formed upon thelower end of the arm.

7, and is retained in position by a set screw 9. The proper oscillatorymovement is imparted to the arm 7 by a rotary path cam 10 which ismounted upon the main drive shaft 11 journaled in the frame 5. The driveshaft 11 is continuously rotated by a drive pulley 12 connected to anyconvenient source of motive power. The arm 7 is operatively connected tothe path cam 10 by a cam roll 13 which is journaled upon the end of thearm. During the time that the jaws 1 and 2 are open, the head of a tackis inserted between the jaws which then close automatically to engagewith and hold the tack in a fixed position. The tack is partially pulledby holding it in this position and moving the shoe relatively to thetack. To this end, a shoe engaging plunger 14 is provided which movesnormally to the plane of the jaws into contact with the bottom of theshoe. The plunger is adjustably held in a head 15 formed upon the freeend of an arm 16 and is arranged to engage with the shoe adjacent to thetack. The arm 16 is pivoted at its opposite end to the frame of themachine and in order to rock the arm andactuate the plunger a link 17 isconnected midway 'of the arm and is fastened at its opposite end to aslide block 18. The block 18 is slidingly mounted upon a horizontal rod19 supported at its opposite ends in the bracket 4; and retained inposition by a set screw 20. The slide block is moved longitudinally ofthe rod in order to rock the arm 16 by a cam roll 21 which is journaledupon the block and engages with the path cam 10. The arrangement of thecam rolls 13 and 21 and the timing of the path cam 10 is such that thejaws l and 2 are first opened while the plunger 14L is held in itsraised position. The jaws are then closed and while held in thisposition the plunger is forced downwardly in order to partially pull thetack. The jaws are then opened and the tack is released. In order tovary the extent of movement of the shoe, and consequently the amountwhich the tack is lifted, the shoe engaging plunger 14, as statedpreviously, is adjustably mounted in the head 15 and is retained in anyadjusted position by a set screw 22.

While it is preferred to employ the spe' cific construction andarrangement of parts shown and described, it will be understood thatthis construction and arrangement is not essential except so far asspecified in the claims, and may be changed and modified withoutdeparting from the broader features of the invention. V

The preferred form of theinvention having been described, what isclaimedis 1. A tack pulling machine having, in com-.

bination, means for grasping the tack and holding it' in a fixedposition, and means for positively moving the shoe while the tack isheld in order to partially pull the tack, substantially as described.

2. A tack pulling machine having, in com bination, means for graspingthe tack and holding it in a fixed position, and means arrangedto movethe shoe whilethe tack is held, the latter means having provision foradjustmentin order to vary the extent of movement of the shoe,substantially as described.

3. A tack pulling machine having, in com bination, tack gripping jaws, ashoe-engaging plunger, and power actuated mechanism for moving theplunger relatively to the jaws in order to force the shoe away from thejaws and lift the tack, substantially as described.

i. A tack pulling machine having, in combination, a pair of tackgripping jaws, means arranged to close the jaws upon a tack while theshoe is held stationary, and a plunger arranged to engage with the shoeand move the shoe away from the jaws when the jaws are closed in orderto lift the tack, substantially as described.

5. A tack pulling machine, having, in combination, a pair of tackgripping jaws, a shoeengaging plunger, and a cam arranged to open andclose the jaws and to move the plunger relatively to the jaws in orderto lift the tack, substantially as described.

6. A tack pulling machine having, in combination, a stationary tackgripping jaw, a movable tack grippingj aw cooperating there with, ashoe-engaging plunger supported ad- 7 j acent to the jaws, and a singlecam arranged to actuate the plunger and movable tack gripping jaw,substantially as described.

7. A tack pulling machine having, in com bination, movable tack grippingjaw, an arm supporting the movable jaw, a path cam, operativeconnections between the arm and path cam arranged to oscillate the arm,and a shoeengaging plunger operatively connected to the path cam,substantially as described.

8. A tack pulling machine having, in combination, a pair of tackgripping jaws, a pivoted arm, a shoe-engaging plunger supported upon thefree end of the arm, a slide block, link connections between the slideblock and central portion of the arm, a path cam, and operativeconnections between the slide block and path cam, substantially asdescribed.

I JOHN B. HADAWAY. Witnesses:

GHns'rnR E. RoeERs, LAURA M. Goonnmen.

Copies of this patent mav be obtained for five 'cents each, byaddressing the Commissioner of Patents,

I a Washington, D. G. 7 V

a stationary tack gripping jaw, a' 7

